Source Code for Module _Framework.ButtonSliderElement

 1  #Embedded file name: /Users/versonator/Hudson/live/Projects/AppLive/Resources/MIDI Remote Scripts/_Framework/ButtonSliderElement.py 
 2  from SliderElement import SliderElement 
 3  from InputControlElement import InputControlElement, MIDI_INVALID_TYPE 
 4  from ButtonElement import ButtonElement 
 5   
 6 -class ButtonSliderElement(SliderElement): 
 7      """ Class representing a set of buttons used as a slider """ 
 8      _last_sent_value = -1 
 9   
10 -    def __init__(self, buttons): 
11          raise buttons != None or AssertionError 
12          raise isinstance(buttons, tuple) or AssertionError 
13          raise len(buttons) > 1 or AssertionError 
14          SliderElement.__init__(self, MIDI_INVALID_TYPE, 0, 0) 
15          self._buttons = buttons 
16          self._last_button_lit = -1 
17          identify_sender = True 
18          for new_button in self._buttons: 
19              raise new_button != None or AssertionError 
20              raise isinstance(new_button, ButtonElement) or AssertionError 
21              new_button.add_value_listener(self._button_value, identify_sender) 
22   
23 -    def disconnect(self): 
24          if self._parameter_to_map_to != None: 
25              self._parameter_to_map_to.remove_value_listener(self._on_parameter_changed) 
26          SliderElement.disconnect(self) 
27          self._buttons = None 
28   
29 -    def message_channel(self): 
30          raise NotImplementedError, 'message_channel() should not be called directly on ButtonSliderElement' 
31   
32 -    def message_identifier(self): 
33          raise NotImplementedError, 'message_identifier() should not be called directly on ButtonSliderElement' 
34   
35 -    def message_map_mode(self): 
36          raise NotImplementedError, 'message_map_mode() should not be called directly on ButtonSliderElement' 
37   
38 -    def install_connections(self, install_translation_callback, install_mapping_callback, install_forwarding_callback): 
39          pass 
40   
41 -    def connect_to(self, parameter): 
42          if self._parameter_to_map_to != None: 
43              self._parameter_to_map_to.remove_value_listener(self._on_parameter_changed) 
44          InputControlElement.connect_to(self, parameter) 
45          if self._parameter_to_map_to != None: 
46              self._parameter_to_map_to.add_value_listener(self._on_parameter_changed) 
47              self._on_parameter_changed() 
48   
49 -    def release_parameter(self): 
50          if self._parameter_to_map_to != None: 
51              self._parameter_to_map_to.remove_value_listener(self._on_parameter_changed) 
52          InputControlElement.release_parameter(self) 
53   
54 -    def identifier_bytes(self): 
55          raise RuntimeWarning, 'identifier_bytes() should not be called on ButtonSliderElement' 
56   
57 -    def send_value(self, value): 
58          if value != self._last_sent_value: 
59              index_to_light = 0 
60              if value > 0: 
61                  index_to_light = int((len(self._buttons) - 1) * value / 127) 
62              for index in xrange(len(self._buttons)): 
63                  if index == index_to_light: 
64                      self._buttons[index].turn_on() 
65                  else: 
66                      self._buttons[index].turn_off() 
67   
68              self._last_sent_value = value 
69              self._last_button_lit = index_to_light 
70   
71 -    def _button_value(self, value, sender): 
72          self.clear_send_cache() 
73          if value != 0 or not sender.is_momentary(): 
74              index_of_sender = list(self._buttons).index(sender) 
75              midi_value = int(127 * index_of_sender / (len(self._buttons) - 1)) 
76              if self._parameter_to_map_to != None and self._parameter_to_map_to.is_enabled: 
77                  param_range = self._parameter_to_map_to.max - self._parameter_to_map_to.min 
78                  param_value = param_range * index_of_sender / (len(self._buttons) - 1) + self._parameter_to_map_to.min 
79                  if index_of_sender > 0: 
80                      param_value += param_range / (4 * len(self._buttons)) 
81                      if param_value > self._parameter_to_map_to.max: 
82                          param_value = self._parameter_to_map_to.max 
83                  self._parameter_to_map_to.value = param_value 
84              self._last_button_lit = index_of_sender 
85              self.notify_value(midi_value) 
86   
87 -    def _on_parameter_changed(self): 
88          raise self._parameter_to_map_to != None or AssertionError 
89          param_range = abs(self._parameter_to_map_to.max - self._parameter_to_map_to.min) 
90          midi_value = int(127 * abs(self._parameter_to_map_to.value - self._parameter_to_map_to.min) / param_range) 
91          self.send_value(midi_value) 
92